An official Star Wars account has opened on Instagram; and, while there are no Episode 7 images (yet...), for those interested, here are the images that have been uploaded so far:
Darth Vader 'Selfie'
'Behind the scenes' Image from the Bespin Duel
Star Destroyer Concept Model
'Slave Leia' Group Pic
Vintage Kenner Rancor w/ Box
Death Star II Close Up Detail
Uncle Owen Lars (ANH)